Method for controlling valves of an engine having a variable event valvetrain during an engine stop
AssigneeFord Global Technologies, LLC
InventorAlex Gibson
Life of this patent
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Abstract
A method for controlling a variable event valvetrain during engine stop conditions is described. According to the method engine valves may be controlled to so that subsequent engine starting may be facilitated and so that energy consumption may be reduced.
Claims29
A method for controlling valves during an engine stop for an internal combustion engine having a variable event valvetrain, the method comprising:
- releasing at least a valve after said engine stops;
- positioning at least a valve in response to an indication to ready said engine for start;
- and maintaining the position of said at least a valve while said indication has changed a plurality of times without requesting an engine start.
A method for controlling valves during an engine stop for an internal combustion engine having a variable event valvetrain, the method comprising:
- releasing at least a valve after said engine stops in response to an operator initiated engine stop request;
- positioning said at least a valve to a first position in response to an indication to ready said engine to start;
- maintaining said at least a valve in said first position for a duration while said engine is stopped;
- releasing said valve after said duration;
- and repositioning said at least a valve and starting said engine after an operator request.
A computer readable storage medium having stored data representing instructions executable by a computer to control an engine having a variable event valvetrain, said storage medium comprising:
- instructions for releasing at least a valve after said engine stops in response to an operator initiated engine stop request;
- instructions for positioning at least a valve in response to an indication, said indication used to ready said engine to start after an engine stop, said indication occurring after said engine stop;
- and instructions for maintaining the position of said at least a valve while the operator indication has changed a plurality of times without requesting an engine start.
A method for controlling valves during an engine stop for an internal combustion engine having a variable event valvetrain, the method comprising:
- positioning a first valve at a first position and a second valve in a second position in response to an indication, said indication readying an engine for start after an engine stop, said indication occurring after said engine stop;
- maintaining said first valve at the first position for a first duration while said engine has not been started;
- maintaining said second valve at the second position for a second duration while said engine has not been started;
- and
- releasing said first valve from the first position after said first duration and releasing said second valve from the second position after said second duration.
Dependencies are inferred from the claim text.